Means for conveying magnetic material



June 30, 1931. w Tz 1,812,505

MEANS FOR CONVEYING MAGNETIC MATERIAL Filed May 9, 1929 INVENTOR PO) 0. WE'HTZ A ORNEY Patented June 30, 1931 UNETEE STATES "PATENT QFFIOE ROY O. WER'IZ, OF CLEVELAND, OHIO, ASSIGNOR TO THE OHIO ELECTRIC MANUFACTUR- ING- CO., OF CLEVELAND, OHIO, A CORPORATION OF OHIO MEANS FOR- CONVEYING MAGNETIC IVIATERIAL Application filed May 9, 1929. Serial No. 361,559.

This invention relates generally to the art of conveying magnetic material, such for example, as elongated iron or steel articles. It is particularly concerned with a new and improved method of conveying elongated magnetic articles and with a new and 1mproved mechanism for conveying such art1- cles.

In the art of conveying elongated magnetic articles such as iron or steel in sheets, strips or other forms or shapes, it has been proposed toemploy a hollow rotatable cylinder of nonmagnetic material on which the article rested while being conveyed and to mount a magnet inthe cylinder. The magnet was intended to attract the article and hold it against the cylinder with little or no slippage wh1le the cylinder rotated and carried the article along to the next roller. In practice, however, the

apparatus has not been entirely satisfactory.

I have discovered that when the cylinder is made of sufiicient thickness to stand the loads imposed on it, the air gaps between the poles of the. magnet and the articles were so great that the resultant attractive force on the latter was smaller than desired for most efiicient operation. The spaces intervening between the poles and the article consist in part of the non-magnetic material of the shell and in part of open air but from a magnetic conducting standpoint all the intervening distances may be considered as air gaps because the non-magnetic shell is little if any better than open air as a conductor.

I have discovered how to make such prior apparatus highly eflicient and satisfactory and how to convey elongated metallic articles positively and cheaply by magnetic means.

In the drawings accompanying and forming a part of this specification Fig. l is a longitudinal central vertical sectional view of one form of apparatus embodying my invention;

Fig. 2 is a transverse section taken on line 22 of Fig. 1;

Fig. 3 is a fra mentary top plan view of the apparatus of igs. 1 and 2.

In the drawings the conveying roll is made 59- up of a rotating shell and a stationary mag net carrier. The rotating shell 1 is cylindrical in shape with one end closed by disc 2 which is united to a. shaft 3. The shaft 3 is supported in bearings (not shown) adjacent to disc 2 and may be provided with means for shaft 4 carries beyond disc 5 an open topped box-like extension 6 which extends for substantially the full inside length of shell 1. This extension has an upstanding partition 7 disposed centrally in and spaced substantially equidistant from the side walls 8 and end walls 9 of the box-like member 6. In the spaces between partition 7 and walls 8 and 9 electric windings 10 are placed and have lead out connections through shaft 4. The upper edges of walls 7, 8 and 9 are shaped to conform to and lie closely adjacent to the interior wall of shell 1. v When electric current flows in the wind-- ings 10 the magnet will be energized and lines of force will extend from the central pole 7 to the side poles 8 and also to the small end poles 9. These lines of force are, by my invention, made to pass directly through the shell in concentrated form and into the superimposed magnetic article 12 and then back through the shell to the opposite pole.

The shell 1 which is composed of non-imagnetic material is provided with means to concentrate the magnetic lines of force extend ing between the poles 7 and 8 of the magnet, and greatly shorten the air gap between the poles and article being conveyed so that the lines of force will exert a strong pull on the article toward the poles 7 and 8. This means is shown in the form of a plurality of pieces 11 of magnetic material extending through the walls of shell 1. These pieces 11 can, of course, he of various shapes, lengths and sizes and may be cast in place or inserted in holes provide-d therefor. The amount of.

magnetic pull which can be exerted on a magnetic articleon shell 1 Will depend to a considerable extent on the number, size and 5 disposition of pieces 11 and the pull desired will thus determine largely, the size, and number of the pieces 11 in any specific instance. These pieces also concentrate the lines of force and since they extend radially or the shell, serve .to prevent any short .circu'iting of the lines of force as'Wou-ldbec'possible if the pieces 11 extended circumferentially or axially of the shell.

WVhen the shell 1 Witl pieces 11 is used and 15 current passes through windings 10 the lines of force will be .concentrated in the gpieces 11 and lhence will extend through shell 11, here they can enter, a magnetic article on shell 1 in such :numbers as -to.eXert ,astrong 2 pull .on the article againstthe shell.

Byfa magneticmaterial orv article is meant ,one capable of. beinglattractedby a magnetic force. i v "Having thus described my invention so 2 that trans may .be enabled to practice the same desire to. secure by Letters Patent is set forth "in What .is claimed.

Wh at, is claimed 'is:

, conveyorton elongated magnetic articles which comprises .a [stationary multi- 'peiargmagaet extending transversely to the @lirectio'n.joftravel oi;the articles, and ainonmagnetic. shell. rotatable about. theimagnet for conveyingtm articles,l'the 'shellhaving. means foip'concentrating; the magnetic lines of vforce at the outsidesurfaceofthe shell and above the poles of the magnet.

v ,A'co'n'veyorTforelongatedmagnetic articles which {comprises a stationary inultipain magnet extendingtransversely to :the

direction: of travelof thearticles, .and a nonmagne'ticsh'ell (rotatable about themagnet for conveying'th'e articles,-'th.e shell. having means for passing :linespf jforc'e therethrough in concentratqdcondition.

A conveyor "for elongated magnetic/arti' which comprises a [stationary multipolar magnet extending transversely to the direction "of travel of. the, articles, and anon- 9 magnetic's'hell rotatable about themagnetfor comprises a stationary multipolar magnet extending transversely of the direction of travel of the articles and a nonmagnetic shell rotatable about the magnet for conveying such an article thereon, said shell having in it portions of magnetic material so disposed as to decrease the resistance to the flow of magnetic lines of force from the poles of the magnet to and from the article and to concentrate said lines of forc'e, the said portionsbeing so disposed as'to compel travel of the lines of force through said article.

'6. A conveyorfor magnetic material comprising a hollow non-magnetic roll, means Within the roll for establishing a magnetic 'fieldincluding that part ofthe said material in contact with-the roll, and radial inserts of permeable material in the rollfor carrying the-flux between said material andsaid means.

7 A hollow roll of non-magnetic materi-al having particles of permeable material there- '11. A conveyor for magnetic mat'erialcomprising a holloWnon-magnetic roll having a plurality ofradial inserts of permeablev material disposed therein, and a magnet Within the-r01 V In testimony whereof l hereunto;affix my signature-this 24lth day of-April, -1 -929.

' ROY O. W ERT-Z.

ionvjey ng the articles, the she'll having a f plurality jofpieces of magnetic materia'l disposed .{thierein to concentrate the ,magnetic line's'ofliforce. 5 fl. {A eonyg j or for elongatedmagneticiarens which comprises a \fsta'tionary .multif ar .magnet. extending transverselyjto the di ion of travel ofthe articleajan'da nonmagnet c shell rotatable about the magnet 6 for conveyingthe articlesgfthe shellghaving a of, .pieces of ,magnetic material disposed therein and adapted to .Cle'crease the air gap between the poles and the anti- (as [being conveyed.

455 5. Aconveyor iciir magnetic articles which 

